Correct Answer : Option (D) : Both P1*b1*Vf1 & P2*b2*Vf2
Explanation : Discharge of radial flow reaction turbine is product of perimeter of runner, thickness, whirl velocity, at inlet as well as outlet runner vanes.
Where, P1=perimeter of runner at inlet, P2=perimeter of runner at outlet, b=thickness and Vf=flow velocity.
